<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span
          v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
          class="no-redirect"
          >{{ item.meta.title }}
        </span>
        <a class="redirect" v-else @click.prevent="handleLink(item)"
          >{{ item.meta.title }}
        </a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import pathToRegexp from "path-to-regexp";
import { setIsHome, getIsHome, setAdminSwitch } from "@/utils/auth";
export default {
  data() {
    return {
      levelList: null
    };
  },
  watch: {
    $route() {
      this.getBreadcrumb();
    }
  },
  created() {
    this.getBreadcrumb();
  },
  methods: {
    getBreadcrumb() {
      // only show routes with meta.title
      let matched = this.$route.matched.filter(
        item => item.meta && item.meta.title
      );

      const first = matched[0];
      if (this.$store.state.user.shopUuid && getIsHome() == 1) {
        matched = [{ path: true, meta: { title: "返回后台" } }].concat(matched);
      }

      this.levelList = matched.filter(
        item => item.meta && item.meta.title && item.meta.breadcrumb !== false
      );
    },

    isHome(route) {
      const name = route && route.name;
      if (!name) {
        return false;
      }
      return name.trim().toLocaleLowerCase() !== "Home".toLocaleLowerCase();
    },

    pathCompile(path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route;
      var toPath = pathToRegexp.compile(path);
      return toPath(params);
    },
    handleLink(item) {
      if (item.path) {
        this.$store.commit("user/SET_SHOP_UUID", null);
        setAdminSwitch(1);
        setIsHome(0);
        location.reload();
      } else {
        const { redirect, path } = item;
        if (redirect) {
          this.$router.push(redirect);
          return;
        }
        this.$router.push(this.pathCompile(path));
      }
    }
  }
};
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: $font-size-nav;
  line-height: 100px;
  margin-left: 8px;

  .no-redirect {
    color: #efefef;
    cursor: text;
  }

  .redirect {
    color: #efefef;
  }
}
</style>
